Windmill.



No. 665,838. Pata nted Ian. 8, mm.

C. P. PRITCHARD.

WINDMILL.

(Applicst ion filed June 13, 1900.)

(No Model.)

NrTED STATES ATENT FrrcE.

WINDMILL.

$PECIFICATION forming part of Letters Patent No. 665.838, dated January8, 1 901.

Application filed June 13,1900. Serial No. 20,152. (No model.)

To all whom it may concern.-

Be it known that LCHARLES P.PRITCHARD, residing at Laurel, in the countyof Cedar and State of Nebraska, have invented certain usefulImprovements in Windmills; and I do hereby declare that the following isa full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same, reference being had to the accompanying drawing, which forms apart of this specificat-ion.

This invention relates to a new and novel improvement in windmills.

The object of my invention is to provide a windmill having a pitmancounterbalanced by means of a spring, in combination with a simple brakemechanism to check the speed of the working parts, as will be describedmore fully hereinafter.

In the accompanying drawing I have shown in the figure a perspectiveview of a windmill embodying my invention.

My invention embodies, essentially, a head or turn-table 27, which isadapted to be 'se cured to a suit-able standard and is provided with anopening through which may pass a suitable pump-rod 6. Working upon thisturn-table 27 is a head 26, this head being provided with a collar whichextends through the turn-table 27, so that the head 26 is securely butrevolubly united to the turn-table. Extending upward from this head 26are two supports 1 1, which above are provided with the bearings 2 and3, which support a crankshaft 4, which crank-shaft is provided at oneend with the grooved sheave 21, secured by means of the nut 22 to theshaft, the depending pitman 5, and the wind-wheel W, which latter isshown in broken section.

Secured to the upper bearings 2 and 3 is a bracket 8, from which dependsa spring 7, which is secured to the head a, attached to the upper end ofthe pump-rod 6, and this head a is provided with a pin 23 to receive thelower end of the pitman 5. This spring is so arranged that thewind-wheel W when it does no work-that is, when the pump-roddescendsworks against the pressure of this spring 7, which consequentlyaids in lifting the rod.

Positioned adjacent the grooved sheave 21 is a bar 29, secured by meansof the upper bracket 35, and upon this bar 29 works a frame 34, holdingthe vane V.

Extending from the bracket 35 is an arm 30, to which is secured a spring31, secured also to the bracket 34, so that the vane, which is permitteda swinging motion in one direction against the spring, will normally bebrought back into alinement with the shaft 4 by means of this spring 31.The stop 33, secured to the lower end of the bracket 34, prevents thevane from turning beyond alinement with the shaft upon that side.

Depending from the bracket 8 is a notched swinging dog 12, Within thenot-ch of which rests the stem 18 of a brake-shoe 20, supported by meansof a pin 19. This brakeshoe is normally drawn away from the SllGBAG 21by means of the spring 13, secured to the stem 18. To this stem 18 isalso secured a pulley 14, over which works a chain 15, secured to anoperating-rod 17 and to the arm 28, forming part of the bracket 34. Thisarm is provided with a nosing 16, as shown. Normally the vane V will bein alinement with the driving-shaft 4, so that the pump will properlyoperate,the working or lifting power of the shaft being increased bymeansof the spring 7, as has been set forth. Now should it be desired tothrow the mill out of the wind the operator would draw down the bar 17,which would swing around the bar 2S,against the tension of the spring31, to carry the vane out of alinement until the nosing 16 engaged thedepending dog 12 to release the brakeshoe 20, which would then work intothe groove of the sheave 21 and so check the movement of the shaft. Theoperating-bar would then be secured to prevent and hold out of work thisshaft.

' The working effects are all simple and readily accessible.

Having thus described my said invention, what I claim as new, and desireto secure by United States Letters Patent, is-

In a windmill of the character described, a revolving head, acrank-shaft working within said head, a pitman depending from saidcrank-shaft, a spring secured to said head and to said pitman, abrake-wheel secured to said crank-shaft, a pivoted brake-shoe norreleasesaid brake-shoe, as and for the purmally locked by means of a dog, a,swinging pose set forth.

vane provided with a projecting nosing, a

spring to normally hold said vane in aline- CHARLES PRITCHARD ment, andan operating-bar to actuate said In presence ofvane against the tensionof said spring to JOHN WELBURN,

force said nosinginto contact with said dog to O. A. JOHNSON.

